Herewith Kizuna Duratech D61 Top quality badminton stringing assessment; Kizuna Duratech D61 quality badminton string by ERR badminton restring Singapore. Kizuna D61 is simply introduced in 2019. This Kizuna D61 badminton string as it is possible to see the gauge is slim only 0.61mm, but this string able to supply “really hard” emotion.